This report describes an implementation of a variation of the hidden-line algorithm developed by P. Loutrel. The new algorithm produces hidden-line drawings of scenes composed of opaque polyhedra as well as of some more general types of flat-faced objects not covered by the original Loutrel algorithm. The program is written in Fortran IV and has been implemented in a batch version on a CDC 6600 computer and in an interactive version on an ADAGE AGT-30 interactive graphics computer. (Author)